You could share with all time-nuts if you uploaded to Diddiers site. http://www.ko4bb.com/cgi-bin/manuals.pl <http://www.ko4bb.com/cgi-bin/manuals.pl>I have placed rom images there for HP gear as an example Regards Paul
On Sun, Feb 27, 2011 at 11:06 PM, Jean-Louis Oneto < jean-louis.on...@obs-azur.fr> wrote: > I have a scan of the schematics (A3 format), but it is rather heavy > (3.6MB); Do you know of a place to store such a beast ? I have also a copy > of the manual it self, but that's easier to find (I got mine from the SRS > web site) > Have a nice day, > Jean-Louis Oneto > France > e-mail: jean-louis.on...@obs-azur.fr > > ----- Original Message ----- From: "J. Forster" <j...@quik.com> > To: "Discussion of precise time and frequency measurement" < > time-nuts@febo.com> > Sent: Sunday, February 27, 2011 9:27 PM > Subject: Re: [time-nuts] SR620 calibration > > > And the schematics? I've tried without success. >> >> Repairing hardware w/o schematics is pretty tough. >> >> -John >> >> =========== >> >> >> Regarding the SR620 counters, I must have missed something.... It >>> seems to me that SRS is providing about as much support as Tek or >>> Agilent. All three offer PDF manuals and repair service. I doubt any >>> of them have free telephone repair support for out-of-warranty >>> products. >>> >>> I did a Google search for "stanford research sr620 manual pdf" and it >>> returned a number of sites, including SRS and NASA, that had the SR620 >>> manual available for free download in PDF format. I had looked for >>> that manual several years ago and found it then too. I did a quick >>> compare against the paper copy of the manual and it seems to be >>> similar although I will not say exactly the same since I didn't look >>> that close. >>> >>> Since the manual has full directions for using the counter and for >>> doing calibration, I don't understand the comments that SRS doesn't >>> support the product and make the info available. The schematics are >>> not included in the PDF manual but that is true of most electronic >>> products. I expect my paper manual has them although I haven't >>> checked. >>> >>> Regarding the cost of repairs, I don't care what company you talk to, >>> they are ALL too expensive for me. But since I didn't buy the >>> equipment new with a warranty I don't see where that is their problem. >>> I bought my car out of warranty and I don't expect the dealer to do >>> repairs for cheap. I have several pieces of test equipment that were >>> labeled "Not Economical To Repair." That is why they were in the scrap >>> bin. But they work good enough for me to use as long as I can live >>> with the fault. >>> >>> I do like the counter even though I've never used any of the advanced >>> features it has. My only complaint was the 10^-6 accuracy of the TXCO >>> reference oscillator but since I can calibrate it at will and can use >>> my Z3801A as an external reference, I can live with that. Somewhere >>> along the line I need to do some research or get one of the gurus on >>> the reflector to explain how to use the SR620 for doing Allen variance >>> and other quality checks of the various GPSDO, rubidium, and OCXO >>> oscillators I've collected in recent years. That is about the most >>> advanced feature I need from the SR620. >>> >>> I probably don't qualify as a real time-nut since my main interest is >>> to get my 10GHz station within a few hundred Hz of 10368.100 MHz. A >>> few parts in 10^-11 is good enough for that..... And I would like to >>> compare my various reference oscillators just to verify they are >>> working as well as can be expected. But that doesn't make me a REAL >>> time-nut.... :-) >>> >>> I don't intend to rekindle the previous discussion, I just don't >>> understand the negative comments. I have several SR620 counters and >>> for a 1GHz counter I think they are pretty good. For higher >>> measurements I got lucky on eBay purchasing an EIP 25B counter that >>> seems almost new. I didn't get as lucky with the HP 5340A I bought >>> first. Expensive and unobtainable mixer parts make the 5340A >>> unrepairable..... >>> >>> I do enjoy the technical discussions on the list. I particularly liked >>> the discussion about rejuvenating a rubidium lamp. The N4IQT web page >>> mentions the procedure but the time-nuts discussion provides a lot >>> more detail. That should be added to a web page somewhere along with >>> long term measurements of the results to indicate how the fix is >>> holding. I'm sure there are a lot of people who would be interested in >>> extending the life of their old rubidium oscillator. Having that info >>> would certainly make me sleep better if buying a surplus rubidium on >>> eBay..... >>> >>> 73, Doug Reed, N0NAS. >>> >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >>> >>> >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.